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What is RO Water Purifier?

The full form of RO water is Reverse Osmosis Water. RO stands for Reverse Osmosis. This means these kinds of water purifiers employ reverse osmosis technology for purification of water.

Reverse Osmosis (RO) is a unique technology that continually purifies tap water. Toxic chemicals, harmful metals, and illness-causing germs pollute most water sources. Long-term consumption of polluted water can result in severe damage.

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5 types of advanced water purification technologies

UF purification

UV purification or e-boiling

Candle filter purifier

Activated carbon filter purifier

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** RO= Reverse Osmosis, UV=Ultra Violet, UF=Ultrafiltration, TDS=Total dissolved solids, MTDS=manual total dissolved salts, SCMT=Silver Charged Membrane Technology

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How does RO Water Purifier work?

Contrary to popular beliefs, RO purification is a straightforward system. The method is influenced by the natural reverse osmosis process, which the human kidney uses to draw water from the blood.

1. The water filtration process begins by pushing water through a pre-filter, also known as a sediment filter.

2. The process removes dissolved solids (TDS) like salts from the water. It removes about 90-99% of the salts, leaving the solid waste behind in the reject stream.

3. Post this; the booster pump works by building water pressure. The pressure forces regular tap water through a semi-permeable membrane.

4. The membrane’s tiny pores force out microscopic elements.

5. This component then removes all particles from the water. These include sodium, chlorine, and calcium molecules.

Apart from the membrane, most standard RO purifiers consist of additional filtering stages. These include mineral and carbon filters.

Whatever gets left behind in the water, post-membrane gets filtered out through the additional filters. Moreover, the activated carbon filter adds the final polish to the output. It removes any foul taste or odor by adjusting the TDS levels.

On the other hand, mineral cartridges add back lost nutrients.

The output of which is better-tasting, healthier water. In the final stage, this water is sent to a storage tank that holds it until the consumer wants to use it.

Parts of RO Purifier

Despite having different qualities, most RO purifiers look identical. The components are also standard and work in similar ways.

You need to have some basic understanding of these components to assemble RO water purifier your own.

So, let’s have a look at the parts of typical RO purifier:

1. In-let Valve

The inlet valve is the source of water for the RO system. Normally, the valve is set up on the cold water line.

2. Pre-Filter

Most of the ROs have a pre-filter as a guard to protect the membrane against salt, silt, and chlorine. It is typically either sediment or carbon filter.

3. RO Membrane

RO membrane is the most significant component that removes considerable health hazards.

4. Post-Filter

Before reaching the faucet, the purified water goes through a post-filter. It is also known as a polish filter. This filter eliminates odor and bad taste, with the by-product tasting sweeter and fresher.

5. Storage Tank

The purified water is then held in this pressurized tank until the consumer opens the faucet.

6. Backward Flow Restricting Valve

A restricting valve is used to prevent a backflow of the treated water from the storage tank. The reverse flow could damage the membrane by rupturing it.

7. Drain Line

The Drain line is mainly attached to the output end of the RO membrane. It discharges wastewater containing contaminants and impurities.

8. Faucet

It is a controllable tap to direct water flow and is typically installed on the kitchen sink.